DevStack fails when trying to set up an environment with IPv6 enabled. The reason is that the env var in use is not being properly initialized. We should use the related local var instead.
Always reproducible
Expected result: DevStack deploys manila with IPv6
Actual result:
2020-12-30 19:52:17.242 | +++ /opt/stack/manila/devstack/plugin.sh:setup_ipv6:1082 : oscwrap subnet create ipv6-public-subnet --ip-version 6 --network public --subnet-pool shared-default-subnetpool-v6 --no-dhcp -c gateway_ip -f value
2020-12-30 19:52:20.354 | +++ functions-common:oscwrap:2346 : return 0
2020-12-30 19:52:20.359 | ++ /opt/stack/manila/devstack/plugin.sh:setup_ipv6:1082 : local public_gateway_ipv6=fd63:376f:9518:1::1
2020-12-30 19:52:20.363 | +++ /opt/stack/manila/devstack/plugin.sh:setup_ipv6:1083 : oscwrap subnet create public-subnet --ip-version 4 --network public --subnet-range 172.24.4.0/24 --no-dhcp -c gateway_ip -f value
2020-12-30 19:52:22.964 | +++ functions-common:oscwrap:2346 : return 0
2020-12-30 19:52:22.967 | ++ /opt/stack/manila/devstack/plugin.sh:setup_ipv6:1083 : local public_gateway_ipv4=172.24.4.1
2020-12-30 19:52:22.969 | ++ /opt/stack/manila/devstack/plugin.sh:setup_ipv6:1086 : oscwrap router set --external-gateway public router1
2020-12-30 19:52:27.312 |
2020-12-30 19:52:27.314 | ++ functions-common:oscwrap:2346 : return 0
2020-12-30 19:52:27.317 | ++ /opt/stack/manila/devstack/plugin.sh:setup_ipv6:1089 : local ipv4_cidr_len=24
2020-12-30 19:52:27.320 | ++ /opt/stack/manila/devstack/plugin.sh:setup_ipv6:1090 : sudo ip -6 addr add fd63:376f:9518:1::1/64 dev br-ex
2020-12-30 19:52:27.340 | ++ /opt/stack/manila/devstack/plugin.sh:setup_ipv6:1091 : sudo ip addr add /24 dev br-ex
2020-12-30 19:52:27.349 | Error: any valid prefix is expected rather than "/24".
2020-12-30 19:52:27.355 | + /opt/stack/manila/devstack/plugin.sh:setup_ipv6:1 : exit_trap
2020-12-30 19:52:27.359 | + ./stack.sh:exit_trap:491 : local r=1
Fixed here: https:/